This book constitutes the thoroughly refereed post-workshop proceedings of the 26th International Workshop on Security Protocols, held in Cambridge, UK, in March 2018. The volume consists of 17 thoroughly revised invited papers presented together with the respective transcripts of discussions. The theme of this year's workshop was fail-safe and fail-deadly concepts in protocol design. The topics covered included failures and attacks; novel protocols; threat models and incentives; cryptomoney; and the interplay of cryptography and dissent.

This book constitutes the thoroughly refereed post-workshop proceedings of the 25th International Workshop on Security Protocols, held in Cambridge, UK, in March 2017. The volume consists of 16 thoroughly revised invited papers presented together with the respective transcripts of discussions. The theme of this year's workshop was multi-objective security and the topics covered included security and privacy, formal methods and theory of security, systems security, network security, software and application security, human and societal aspects of security and privacy, security protocols, web protocol security, and mobile and wireless security.

This book constitutes the thoroughly refereed post-workshop proceedings of the 22nd International Workshop on Security Protocols, held in Cambridge, UK, in March 2014. After an introduction the volume presents 18 revised papers each followed by a revised transcript of the presentation and ensuing discussion at the event. The theme of this year's workshop is "Collaborating with the Enemy".

This book constitutes the thoroughly refereed post-workshop proceedings of the 21st International Workshop on Security Protocols, held in Cambridge, UK, in March 2013. The volume contains 14 revised papers with transcripts of the presentation and workshop discussion and an introduction, i.e. 15 contributions in total. The theme of the workshop was "What's Happening on the Other Channel?."

This book constitutes the thoroughly refereed post-workshop proceedings of the 20th International Workshop on Security Protocols, held in Cambridge, UK, in April 2012. Following the tradition of this workshop series, each paper war revised by the authors to incorporate ideas from the workshop, and is followed in these proceedings by an edited transcription of the presentation and ensuing discussion. The volume contains 14 papers with their transcriptions as well as an introduction, i.e. 29 contributions in total. The theme of the workshop was "Bringing protocols to life."

This book constitutes the thoroughly refereed post-workshop proceedings of the 19th International Workshop on Security Protocols, held in Cambridge, UK, in March 2011. Following the tradition of this workshop series, each paper was revised by the authors to incorporate ideas from the workshop, and is followed in these proceedings by an edited transcription of the presentation and ensuing discussion. The volume contains 17 papers with their transcriptions as well as an introduction, i.e. 35 contributions in total. The theme of the workshop was "Alice doesn't live here anymore."

This book constitutes the refereed proceedings of the 4th European Workshop on Security and Privacy in Ad hoc and Sensor Networks, ESAS 2007, held in Cambridge, UK, in July 2007.

The 17 revised full papers presented were carefully reviewed and selected from 87 submissions. The papers present original research on all aspects of security and privacy in wireless ad hoc and sensor networks and addressing current topics of network security, cryptography, and wireless networking communities. The papers are organized in topical sections on device pairing, key management, location verification and location privacy, secure routing and forwarding, physical security, as well as detection of compromise, and revocation.

The volume LNCS 12287 constitutes the proceedings of the 27th International Workshop on Security Protocols, held in Cambridge, UK, in April 2019. The volume consists of 16 thoroughly revised invited papers presented together with the respective transcripts of discussions. The theme of this year's workshop was "Security Protocols for Humans" The topics covered included Designing for Humans and Understanding Humans, Human Limitations in Security, Secure sharing and collaboration and much more.

This book constitutes the thoroughly refereed post-workshop proceedings of the 24 th International Workshop on Securit Protocols, held in Brno, Czech Republic, in April 2016. The 13 thoroughly revised papers presented together with the respective transcripts of discussions have been carefully reviewed. The theme of the workshop was Evolving Security - considering that security protocols evolve with their changing requirements, their changing mechanisms and attackers' changing agendas and capabilities.

This book constitutes the thoroughly refereed post-conferenceproceedings of the 9th International Conference on Passwords, PASSWORDS2015, held in Cambridge, UK, in December 2015. The 6 revised full papers presented together with 3 revised short paperswere carefully reviewed and selected from 32 initial submissions. Thepapers are organized in topical sections on human factors, attacks, and cryptography.

This book constitutes the thoroughly refereed post-workshop proceedings of the 23rd International Workshop on Security Protocols, held in Cambridge, UK, in March/April 2015. After an introduction the volume presents 18 revised papers each followed by a revised transcript of the presentation and ensuing discussion at the event. The theme of this year's workshop is "Information Security in Fiction and in Fact".